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Electrical and electronic engineering
The electronic tunability of ferroelectric liquid crystal filled photonic crystal fibres is demonstrated for the first time. The tunability is obtained in the wavelength range of 1500 -1600 nm, with a free spectral range of ~ 20 nm. The electronic tunability is achieved by applying an electric field onto the infiltrated photonic crystal fibre which facilitates the photonic bandgap tuning owing to the microsecond order switching speeds of Ferroelectric Liquid crystals. The polarized transmission spectrum shows the behavior of a tunable notch filter with a change in applied voltage. The results obtained could pave the way for the fabrication of fast tunable all-in-fibre devices in the telecom wavelength range.
Mathews, S., Semenova, Y., Farrell, G.:Electronic Tunability of Ferroelectric Liquid Crystal Infiltrated Photonic Crystal Fibre.Electronic Letters, Vol.27, no.13, 2009, pp.2482-2488